<form>
  <div class="form-group">
    <label for="productTitle">商品名称</label>
    <input type="text" class="form-control" id="productTitle" placeholder="输入商品名称">
  </div>
  <div class="form-group">
    <label for="productType">商品类型</label>
    <input type="text" class="form-control" id="productType" placeholder="输入商品类型">
  </div>
  <button type="submit" class="btn btn-primary">搜索</button>
</form>